In response to Rogan's question:
There is a tab labelled "Design" in Dreamweaver MX which keeps track of all of the stylesheet rules for a given page. Right-click on it and select "New CSS Style". You can use CSS to create styles for any imaginable object, but for this example, I'll create a style for body paragraphs (that is, the text between <p> tags).
Now, you can either create a new class (which I'll explain shortly), redefine an html tag, or use a CSS selector (a:link, a:hover, a:visited, a:active).
If you define a new class, you'll want to give it a descriptive name preceded by a period, for example, ".body". To apply this style to a paragraph inside my main html page, I need only to type '<p class="body">'.
If you decide to redefine an html tag, simply select the <p> tag from the dropdown menu, and then all <p> tags within the html page will be affected by the new style.
And the CSS selectors merely affect link behavior.
Once you've chosen a style type, you must choose whether you are going to define your new style in the html page ("global"), or in a special CSS page ("linked"). There is a third option ("local") which consists of adding the CSS into the individual tags (like so: <p style="font-family: georgia, times new roman, serif">) but Dreamweaver will not help you with that, so you must actually learn CSS to use that method.
I think the rest is pretty self-explanatory. If anyone has any questions about CSS or design in general, feel free to ask me.